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  • Can we establish whether or not two quantum systems have been prepared in the same state? We investigate the possibility of universal unambiguous state comparison. We show that it is impossible to conclusively identify two pure unknown states as being identical, and construct the optimal measurement for conclusively identifying them as being different. We then derive optimal strategies for state comparison when the state of each system is one of two known states.
  • Can we establish whether or not two quantum systems have been prepared in the same state? We investigate the possibility of universal unambiguous state comparison. We show that it is impossible to conclusively identify two pure unknown states as being identical, and construct the optimal measurement for conclusively identifying them as being different. We then derive optimal strategies for state comparison when the state of each system is one of two known states. (en)
Title
  • Comparison of unitary transforms
  • Comparison of unitary transforms (en)
skos:prefLabel
  • Comparison of unitary transforms
  • Comparison of unitary transforms (en)
skos:notation
  • RIV/68407700:21340/03:04077619!RIV/2004/MSM/213404/N
http://linked.open.../vavai/riv/strany
  • 2325 ; 2338
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • Z(MSM 210000018)
http://linked.open...iv/cisloPeriodika
  • 9
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
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  • 601803
http://linked.open...ai/riv/idVysledku
  • RIV/68407700:21340/03:04077619
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • quantum information; quantum measurement (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV
  • [846E8F6D79AF]
http://linked.open...i/riv/nazevZdroje
  • Journal of Physics A: Mathematical and General
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
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http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 36
http://linked.open...iv/tvurceVysledku
  • Jex, Igor
  • Barnett, S. M.
  • Andersson, E.
http://linked.open...n/vavai/riv/zamer
issn
  • 0305-4470
number of pages
http://localhost/t...ganizacniJednotka
  • 21340
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